Cost to Run a Tankless Electric Water Heater in Delaware
Delaware's average residential electricity rate is 19.4¢/kWh as of May 2026 — the 33rd cheapest in the country, 5% above the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $74.31 per month.
Per hour
$3.49
at 13,000–27,000 W
Per day
$2.44
0.7 hours/day
Per month
$74.31
383 kWh
Per year
$892
4,599 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.22 | $37.15 | $446 |
| Typical (0.7 hrs/day) | $2.44 | $74.31 | $892 |
| Heavy (1.4 hrs/day) | $4.89 | $149 | $1,784 |
Delaware vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a tankless electric water heater in Delaware?
At Delaware's current average residential rate of 19.4¢/kWh (May 2026), a tankless electric water heater with typical usage costs about $2.44 per day, $74.31 per month, or $892 per year.
Is running a tankless electric water heater in Delaware more expensive than average?
Yes. Delaware's electricity costs about 5% more than the U.S. average, so the same usage costs $74.31 per month here versus $70.48 nationally.
What does electricity cost in Delaware right now?
Delaware residents pay an average of 19.4¢ per kWh as of May 2026 — the 33rd cheapest rate of the 51 U.S. jurisdictions we track.